Posted on December 02, 2005 at 05:40Hi,
We have got a accuracy problem with the RTC with our hardware.
We use the RTC to generate the ticks OS with the second interrupt that way :
/* RTC */
RTC_SetSecond(0);
RTC_PrescalerConfig ( 0x8000>>8 ); // environ 4 millisecondes
clock_startup = number of second from 1/1/1970
So the RTC counter count 1/256 seconds from the clock set.
to know what time is it, I do :
time = clock_startup+ (RTC_CounterValue() >> 8 );
If noticed that my clock lost 10 minutes a day.
Where is my mistake ?
Ludo
